There are 20 counters in a box. A counter is chosen and replaced 100 times, the results are 32 blue and 68 red. How many of each color do you think there are in each box?

45 / 360 = 6/x

45x = 2160

x - 2160/45 = 48 people

2)

n = (n - 1) - 5

3)

7x - 11 = 19 - 3x

add 3x to both sides:

10x - 11 = 19

add 11 to both sides:

10x = 30

divide both sides by 10:

x = 30/10 = 3

4)

4 (8) (11) - 64 = 288

5)

(5, 0)

6)

-4x - 3 + 2x - 6 = - 2x - 9

7)

1.8 (-20) + 32 = - 4F

8)

Exterior angle add to 360

360/6 = 60 degrees

10)

2x/9 = 12

2x = 108

x = 108/2 = 54

11)

x = 0

12)

8 + 3 + 1 = 12

240/12 = 20

8 (20) = 160

3 (20) = 60

1 (20) = 20

160 pounds, 60 pounds, 20 pounds